Priming chamber for pump lines



June 3, 1930. I I TQDD I 1,761,504

PRIMING CHAMBER FOR- PUMP LINES Filed June 7, 1928 Inventor Attorney Patented June 3, 1930 UNITED STATES AUGUSTUS n. TODD, on FLEISCHMANNS, NEW YORK PRIMING CHAMBER FOR LINES Application filed June 7,

The present invention relates to pump lines for liquid dispensing devices, such as gasoline filling stat-ion pump and has for its principal object to provide a priming chamher interposed in the pump line and arranged to prevent the draining of the priming chamber should the check valve provided at the intake end of the feed seat.

A further object of the invent-ion is to provide a device of this character of a simple and practical construction, which is efiicient and reliable in performance, relatively inexpensive to manufacture and install in operative position and otherwise well adapted to the purpose for which the same is intended.

Other objects and advantages reside in the special construction, combination and arrangement of the various elements forming the invention as more fully hereinafterde scribed and claimed, reference being had to the accompanying drawings forming part.

hereof, wherein like numerals refer to like parts throughout, and in which: 7

In the drawings:

The figure is a vertical sectional view through the priming chamber constituting my invention.

Referring to the drawing in detail, the invention comprises the casing v5 having a cap 6 threadedly attached at its lower end whereby to close the same. To the upper end of the casing is threadedly attached a coupling 7 having a plurality of forks communicating with the interior thereof to one of which is attached a filling mouth 8 having its intake end closed by a plug 9 threadedly fitted therein.

To the second offset port of the coupling 7 is attached a pipe section 10 communicating with pipe 11 through an elbow '12, said pipe being disposed in parallel relation with respect to the casing and having its lower end disposed within a supply tank and provided with a check valve 13.

p This check valve may be of any suitable construction, as for instance a ball 14 arranged within a cage 15 attached to the lower end of the pipe 11. A pump feed pipe 16 is disposed within the casing 5 with its Walls pipe fail to properly J 1928. Serial No. 283,571,

in spaced relation to the-walls of the casing and having its lower end terminating slight.- ly above the lower end ofthe casing. The upper end of the pipe 16 extends through the coupling 7 and outwardly through an opening formed in the upper portion thereof.

The outer upper end of the pipe 16 is adapted for connection with the pump of the liquid dispensing apparatus. A tubular extension 18 projects laterally from the wall of the pipe 16 at the portion thereof disposed within the coupling 7, the outer end of said extension being closed by a key valve 19.

The upper edge of the valve 19 is hingedly mounted as shown at 20 whereby to provide 65 for the normal closing of the valve by gravitation. In the operation of the device, after the supply tank has been filled with suitable quantity of the liquid, the plug 9 is removed from the intake end of the filling mouth 8 and the casing 5 is primed by filling the same through said mouth. The plug 9 is then replaced and upon the operation of the pump attached to the upper outer end of the pipe 16 the liquid from the supply tank will be drawn upwardly through the pipe 11 and into the casing 5 for discharge through the pipe 16 Should the check valve 13 fail to seat for any reason, the priming charge of the liquid within the casing 5 is prevented from being siphoned therefrom through the} draining of the pipe 11 by reason of the valve 19 Y which will open when the liquid falls below the level of said valve and upon siphoning action to admit air through the upper outer end of the pipe 17 through the extension 18 and into the coupling 7 for displacing the liquid into the pipe 11.

Consequently the priming charge of the liquid will always be maintained in the casing 5. It is obvious that my invention is susceptible to various modifications and changes in construction without departing from the spirit of the invention or the scope of the appended claim, and I accordingly claim all such forms of the device to which I am entitled.

Having thus described my invention, what I claim as new is:

An anti-siphoning attachment for pipe lines comprising a multiway coupling, an elongated tubular casing threadedly connected to the coupling in communication therewith and depending therefrom, a closure cap on the lower end of the casing, a pump feed pipe extending vertically through the coupling and constituting supporting means therefor, said pipe extending longitudinally through the casing in spaced concentric relation thereto and terminating in spaced relation to the free end thereof, said pipe open at its lower end, a vent pipe communicating with the feed pipe and the interior of the coupling, a check valve mounted for operation on the vent pipe in a manner to control the passage therethrough, a fluid intake conduit communicating with the coupling in the horizontal plane of the vent pipe and extending outwardly therefrom and then downwardly in parallelism with the casing, a gravity actuated ball check valve mounted for operation on the free end portion of the intake conduit in a manner to prevent the return flow of the fluid therethrough, and a priming conduit mounted on the coupling in communication therewith and having an upturned free end portion having a closure plug threaded therein.

In testimony whereof I afliX my signature.

AUGUSTUS H. TODD. 

